Accelerated glacier mass loss in the southeastern Tibetan Plateau since the 1970s  

作　　者：Lan-Hua LUO Chang-Qing KE Yu-Bin FAN Zi-Fei WANG 

机构地区：[1]Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China [2]Collaborative Innovation Center of Novel Software Technology and Industrialization,Nanjing 210023,China [3]Collaborative Innovation Center of South China Sea Studies,Nanjing 210023,China

出　　处：《Advances in Climate Change Research》2023年第3期372-386,共15页气候变化研究进展（英文版）

基　　金：This work was supported by the Program for National Natural Science Foundation of China(grant 41830105&42011530120);We acknowledged the German Aerospace Center(DLR)for providing the X-band SRTM DEM,NASA for the NASADEM,USGS for the KH-9 imagery,NSIDC for ICESat-2 ATL06 data,European Centre for Medium-Range Weather Forecasts(ECMWF)for ERA5 Land reanalysis data,and the Global Land Ice Measurements from Space initiative(GLIMS)for RGI 6.0 dataset。

摘　　要：The southeastern Tibetan Plateau(SETP)is a region in High Mountain Asia with the most serious glacier mass loss.However,long-term and large regional-scale studies that estimate glacier mass balance in this area remain limited.In this study,we generated a KH-9 Digital Elevation Model(DEM)(covering 87.6%of the glacier area)for the 1970s from KH-9 Hexagon imagery and quantified geodetic glacier mass over the SETP from the 1970s to 2020 using KH-9 DEM,NASADEM and ICESat-2 ATL06 data.The results show that the SETP was in a state of serious mass loss(at a rate of−0.35±0.03 m w.e.per year)from the 1970s to 2020,and the rate of mass loss accelerated from−0.15±0.05 to−0.56±0.10 m w.e.per year between the 1970s–2000 and 2000–2020.Within the SETP,the glacier mass balance revealed a remarkable spatial heterogeneity.The maximum mean glacier mass loss rate was observed in the Hengduan Shan.Nyainqentanglha exhibited the highest acceleration in the mass loss rate since the 1970s.The warming of air temperature and decreasing snowfall can partly explain the accelerated glacier mass loss in the SETP.The study provides a new long-term glacier mass balance estimation covering almost the entire SETP that suggests the acceleration in glacier mass loss observed in the SETP since the 1970s is a regional tendency,which is crucial for understanding the relationship between glaciers and climate changes.

关 键 词：Glacier mass balance KH-9 hexagon imagery NASADEM ICESat-2 Southeastern Tibetan Plateau 

分 类 号：P46[天文地球—大气科学及气象学]